Atomic layer deposition niobium oxide and lithium niobium oxide as a protection technique for anode-free batteries,Battery Energy

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Atomic layer deposition niobium oxide and lithium niobium oxide as a protection technique for anode-free batteries
Battery Energy ( IF 9.0 ) Pub Date : 2023-12-24 , DOI: 10.1002/bte2.20230051
Kieran Doyle‐Davis ₁ , Keegan Adair ₁ , Changhong Wang ₁ , Feipeng Zhao ₁ , Sixu Deng ₁ , Xueliang Sun ₁

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As demand for extended range in electric vehicles and longer battery lifetimes in consumer electronics has grown, so have the requirements for higher energy densities and longer cycle lifetimes of the cells that power them. One solution to this is the implementation of an “anode-free” battery. By removing the anode and plating lithium directly onto the current collector, it is possible to access the same capacities and voltage windows as traditional lithium metal batteries, with the entirety of the lithium source coming from the cathode. Herein, a copper foil current collector coated with niobium oxide or lithium niobium oxide through atomic layer deposition (ALD) is applied to extend the cycling life of the anode-free batteries by reducing dendrite formation and improving the stability of the lithium metal surface throughout cycling. The ALD coatings are able to extend the cycle lifetime in full coin cells from 20 cycles to 80% capacity retained in the bare copper controls to 50 and 115 cycles for the NbO and LiNbO coatings, respectively. Over the lifetime of the cells, the ALD-LiNbO is able to cumulatively offer a staggering improvement of an additional 100 kWh L⁻¹ compared to the bare copper control.

中文翻译：

原子层沉积铌氧化物和锂铌氧化物作为无阳极电池的保护技术

随着电动汽车对延长续航里程和消费电子产品对更长电池寿命的需求不断增长，对为其供电的电池提供更高的能量密度和更长的循环寿命的要求也在不断增长。解决这个问题的一种方法是采用“无阳极”电池。通过移除阳极并将锂直接电镀到集电器上，可以获得与传统锂金属电池相同的容量和电压窗口，而全部锂源来自阴极。在此，通过原子层沉积（ALD）涂覆氧化铌或锂铌氧化物的铜箔集流体，通过减少枝晶形成并提高锂金属表面在整个循环过程中的稳定性来延长无阳极电池的循环寿命。。 ALD 涂层能够将全纽扣电池的循环寿命从裸铜控制中保留的 20 个循环延长至 80% 容量，分别延长至 NbO 和 LiNbO 涂层的 50 个循环和 115 个循环。在电池的整个使用寿命期间，与裸铜对照相比，ALD-LiNbO 能够累计额外提供 100 kWh L ^{-1的惊人改进。}

更新日期：2023-12-24

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